Where it comes from
The line in the source
劇場版ポケットモンスター ダイヤモンド・パール ディアルガVSパルキアVSダークライ』以来 In English
Debut at #1 had not happened since 2007's film (per the article).
Explore / Figure
Record
Text: first #1 opening since 2007, July 2014
July 2014
EstimateOur model or estimate. Treat it as an order of magnitude.
Found in one pass only. The research team reads every source twice, independently; this record turned up in one reading but not the other, so treat it as less certain than its grade.